Brand new Macbook, 92% Health

Nothing to worry about.

During the first few months, you're going to see that percentage jump around a bit. What's more important is to note the *Full Charge Capacity* of the battery;

To get this information:

1) Open up *System Profiler* in Applications>Utilities
2) Click on Power in the left-hand column
3) Under the battery heading, look for *Full Charge Capacity*. Make a note of this number and then check on your battery every couple of weeks.

~Lyssa

Hi Caris365,

Less than 48 hours and you're already at 5 cycles? Is that normal usage? Technically, you're at less 1000 cycles and still greater than 80% so you're within spec. That could be why AppleCare said nothing to worry about.

As Lyssa asked, I'd be curious to see what the FCC of the battery is versus what it was at right out of box. While iStat Pro is usually pretty accurate, I sometimes question their rounding values. I've seen simple math indicate a percentage or two differential from iStat's output.

Hi Caris365,

That FCC is very normal for the new unibody MacBook. I took a brand new one out of the box yesterday morning to setup and it was a 5271 (right out of the box) and Coconut read 100% FCC.

I have a new MacBook unibody white body. The cycle count is barely 13 but the FCC has dropped to 5397mAh. Is this normal ? Sometimes I think that since the time I have purchased macbook , I am worrying more for battery life cycles. Earlier with windows it used to be viruses , malwares 😟

I am taking the reading from iStatPro and the readings dropped today when the laptop went into low battery sleep mode from long continous use !!

Battery Information:

Model Information:
Serial Number:
Manufacturer: DP
Device name: bq20z451
Pack Lot Code: 0000
PCB Lot Code: 0000
Firmware Version: 0103
Hardware Revision: 0002
Cell Revision: 0130
Charge Information:
Charge remaining (mAh): 5151
Fully charged: Yes
Charging: No
Full charge capacity (mAh): 5151
Health Information:
Cycle count: 42
Condition: Normal
Battery Installed: Yes
Amperage (mA): 266
Voltage (mV): 12579


Just bought my MBP White for a couple of month. Is this normal? Should I be asking questions?

To add to my previous post, using battery,my macbook only last for 4 hours max. (i'm using only camino,words and screen brightness set to half). Is this normal?

I would say that's good, I mean that would meet my standards. I usually have a web browser, email, iTunes, Adium, and NeoOffice, and my screen brightness is between 75-100%. And even then, it lasts about 3 1/2 hours.

Yeah, I had a similar problem before when If first got mine. My battery is in excellent conditions, if I have read other threads correctly

Cycles: 290
Age: 21 months
Health: 96%

I'm getting a little concerned about mine too. I bought it three weeks ago. When I first got it the Fully charged capacity was ~5550mAh, and I thought awesome, it's 100mAh over the intended capacity!

It stayed above the original 5450 for the first 2-3 charges, however since then it's been dropping rapidly.

Current stats:
Cycle Count: 7
Current Battery Capacity: 5071mAh
Original Battery Charge 5450mAh
Health 93%

Every cycle it seems to lose between 50-100mAh, starting to get worried. I've done two battery calibrations now in the hope of stemming the loss of capacity but it doesn't seem to have helped.

At this rate it's going to be below the 80% health after just 20-30 cycles, let alone 300!
Do I have a dud battery or is it just initial fluctuation? The capacity has not risen at all, only gone down.

When I see people posting that their batteries still hold 95%+ capacity after hundreds of cycles, this makes me worried.

The capacity is going to fluctuate a bit in the first few months of ownership. 7 cycles isn't enough to declare the battery a dud. Keep an eye on the health, and if it seems abnormally low at, say, 50 cycles or so, then the battery may be bad.

~Lyssa

Thanks, I thought as much.
The battery still seems to last a very long time and it's a massive improvement on my last laptop (AMD athlon 3700+ desktop processor, Radeon 9700 pro; basically a desktop replacement). Even when that was brand new it only lasted an hour and towards the end it only lasted 10 mins! I have to say It's a breath of fresh air buying a mac, the battery life is fantastic!

That said I still can't pull myself away from a PC as my main comp though, maybe in a few months with my mac I'll be converted though 😀

Did my first caliberation after 25 cycles.. the health has dropped to 94 % ( its still charging to full charge capacity so hoping for a correction in this) .. iStatPro is still not showing accurate statistics.. Any idea what might be the problem in this ?? For example Mac says 1 hr remaining for full charge and iStat is saying 2:15 hrs